After 3 years I still do not understand this stupid thing.
I ran a class last year that didnt use it and now I am debating going back to Stock, aka B Street now.
My region combines classes
And I wanna know how much I can win/lose by in order to still win the class(I could care less about overall pax)

We run with this layout:
AS A Street (0.833) ASR A Street-R (0.848) BS B Street (0.831) BSR B Street-R (0.845) SS Super Street (0.843) SSR Super Street-R (0.860)

 

To figure out what you need to run to tie in pax use Their ET * Their Pax / Your Pax

IE I run BS and my vette friend runs AS. If he runs a 60 second lap, I need to put down a 60.144 to tie him. 60*.833/.831. Had the C6 still been classed in SS like it was last year, I could put down a 60.866 and pull a win in pax.

60 second course run, BS delta:
AS: +.144s
ASR: +1.23s
BSR: +1.01s
SS: +.867s
SSR: +2.09s

 

thank you! i dont know why after all this time nobody has been able to say that.
I do wish it was easier though, as I could just say "I can lose to SS by 1 second on a 60 second course and still win" and then + or - X amount for over 60 seconds/under 60 seconds.

 

All you need to know

http://uncyclopedia.wikia.com/wiki/Autocross

 

LOL at the PAX factors for the street classes

 

I havent decided if I am gonna switch back to stock yet. As of right now I have stock suspension on because I have to send out my KW Clubsports. My original plan was to sell them when they came back and get Motion Control TT2 coilovers and put on my 17x9.5 with 255s that are sitting in boxes.
Problem with that is it obviously puts me in BSP which is also a combined class here with ASP, CSP, and SSP and I feel I have no shot in that. Our first event is in a month and Id hate to run B street at the first few events then lose my points by switching to BSP. Maybe I'll just run BSP from the start and if I wanna switch mods up I can. I just want to chase those stupid MINI coopers in that pax championship

 

The new "Street" pax is a great attempt but I don't think Very accurate. I have been wining Pax at every event by fairly large margins in my G-Street car. However last year I was all over the guy who won F-Mod (and was also number one in PAX at nationals) in the g-street car and this year My pax got easier (for street tires) and his Pax got harder (cause he won F-mod by 4 seconds) and he recently with the new Pax just got me by 1.9 seconds on PAX. I was the first fendered car in the PAX standings, but falling 1.9 seconds to an F-mod says the "STREET" pax isn't soft enough..... and by a lot.

 

Yup. No way a B-Street S2000 is pulling within 1 second of an BSR R-Comped S2000 on a 60 second course. Not to mention that B-Street can only drop .505s on the 60s course to be on par with an STR S2000.

I don't understand why they didn't use the widely accepted Road tire .975 variance to PAX as a starting point for Street PAX values. That would have put B-street at .824.

I understand that a lot of people don't give a rip about PAX, but our club doesn't have enough runners to worry about class wins, so PAX wins are all we have to go on.

 

Funny stuff there Ian. Note that the reverse is true for other cars, like A-street or B-street s2000's, where the PAX is laugh out loud unrealisticly "hard." See post above mine for the explanation and example. Further data, I was typically 3+ seconds off my Hoosier A6 time when I ran Dunlops for a back-to-back comparison

 

I want to try Hoosiers on my STR car then. I couldn't imagine 2+ seconds faster on typical courses